There are three types of devices that can be controlled by color management. Different types of devices. There are different ways to obtain device ICC files. Please click to know how to get ICC of different devices.
Output device ICC
If the output device gets ICC, you must use the device to print some artificially set color patch files, such as TC9.18, IT8.7 / 2 or ECI2002. These files are also called color cards, but unlike the physical color cards used by the input device, these files are all electronic files.
Depending on the printer, this type of file is divided into RGB mode (such as TC2.83 and TC9.18) or CMYK mode (IT8.7 / 2 and ECI2002).
After the printer prints these color blocks, the optical data of the outstanding blocks is measured by a spectrophotometer, and the special software is compared with the original data of the color blocks to analyze and calculate the color characteristic file of the output device-the ICC file.
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The ICC file of the output device can be used as the color working space of software such as Photoshop, so that the software such as Photoshop can display the true color of printing, or can be used as the color of proof.
Note: Except for real laser printing equipment, there is no RGB inkjet printer. They all use cyan, magenta, yellow, and black as the basic inks. Many devices also use "light" to improve highlights and highlights. Details. It is only called an RGB printer, mainly because they ultimately require RGB signals or data as input values ​​(regardless of whether your image is in RGB mode or CMYK mode), and then convert it into an electrical signal of the sub-nozzle inside the printer, So these printers are called RGB printers. [next]
Proofing settings for photoshop
The color of the image opened in photoshop is the color data of the image itself. After being interpreted by the built-in ICC of the image, the color is displayed after being matched by the computer system and your monitor. It mainly shows the built-in of the image itself. The color condition of ICC is not the color condition of your printing device after printing the image. If you need to make the printed image exactly the same as the photoshop display on the screen, you also need to use Photoshop's proofing settings.
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Photoshop's proofing settings can simulate the color of the image on different printing devices and different display devices (as long as you have the characteristic ICC files of these devices). Select the configuration file you need to simulate, and tick the paper white to fully simulate the color status of the image on another medium (such as a computer system image viewer, printing machine, various printers, etc.).
The number of saved colors, the function of the radio box is to help the user to see what happens if an unconverted file is sent to the output device that specifies the description file. This function is only available when the output file and the output device description file share the same color mode, such as an RGB file and RGB output device description file, or CMYK file and CMYK output device description file. It can show how the CMYK file prepared for one printing process is output in another printing process. In this case, the use of this radio box is particularly useful, it can help you decide, for a selected output device, Appropriate conversion or editing is required to work properly.
Select the Save Quantity radio box, which actually means that you do n’t want to convert the image, and you do n’t need to apply any conversion method. Therefore, the Intent menu under it will turn gray.
For detailed usage and description of Photoshop's proof setting, please see here: Photoshop Soft Proofing.
If you need to make the simulated color of the screen and the printed image look exactly the same, you also need to have a standard light source.
The importance of standard light sources
Color is the art of light. Without light, there is no color. Similarly, different light has a great influence on color. In order to ensure that the color displayed on the print medium is as consistent as possible with the screen and the stability of the light source, at the same time, in order to meet the national standards for light sources, it is best to read the manuscript at the end To configure a standard light source.
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However, if all the room lighting is made into standard light sources that meet the requirements, the cost will be very high.
However, there are many light boxes with standard light sources on the market at reasonable cost, which can also meet everyone's lighting requirements.
Basic requirements for standard light sources:
Color temperature: 5000K or 6500K
Color rendering index:? 90Ra
Illumination: around 1000 (lux)
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